Really liked this one! A proper little FPS game. I'm amazed you managed to implement so many movement mechanics like wall running, diving, grappling hook, etc. Reminds me of the indie FPS games by Greylock Studios. The gunplay / game feel was pretty on point, guns felt satisfying to shoot, and exploding the roaches felt good. I think some mild improvements like hit markers (briefly flashing a marker on the crosshair when you hit) and on-hit animation reactions from the enemies would be nice further improvements.
For some reason I couldn't get the machine gun to work, I don't know if I just didn't find it or it was bugged or what happened? The pistol and shotgun were great though.
Loved the rage mode to hit on the theme, very satisfying running around one-punching bugs.
Overall, very nice work, I had a lot of fun fighting my way to the bug boss and beating it!